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A police crime scene vehicle is parked in front of the luxury Manhattan apartment building where police say a nanny stabbed two small children to death in a bathtub and then stabbed herself in New York, Thursday, Oct. 25, 2012. Police say the children's mother found the scene after returning home with another child. (AP Photo/Kathy Willens)

A police crime scene vehicle is parked in front of the luxury Manhattan apartment building where police say a nanny stabbed two small children to death in a bathtub and then stabbed herself in New York, Thursday, Oct. 25, 2012. Police say the children's mother found the scene after returning home with another child. (AP Photo/Kathy Willens)